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| 刮刀钻头 | |||
| 鱼尾钻头 | |||
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| 刮刀型钻头 | |||
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лопастное долото : 8 phrases in 4 subjects |
| Drilling | 1 |
| General | 3 |
| Oil / petroleum | 3 |
| Oil and gas technology | 1 |
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